* Hybrid means an organism that has two different alleles (versions of a gene) for a particular trait.

* Heterozygous describes a genotype where the two alleles are different.

* Recessive refers to a trait that only appears if an individual has two copies of the recessive allele.

* Purebred refers to an organism that has two identical alleles for a trait (homozygous).

Example: A hybrid flower with red petals and white petals might have one allele for red petals and one allele for white petals. This makes it heterozygous.